- Radio Stations & Broadcasting Companies, Ogdensburg
- Radiotelephone Communications, Ogdensburg
- Railroad & Subway Construction Contractors, Ogdensburg
- Railroad Contractors, Ogdensburg
- Ready Mix Concrete, Ogdensburg - Concrete Suppliers, Dealers & Company
- Ready Mix Concrete Producers, Ogdensburg
- Real Estate, Ogdensburg - Agent, Broker & Companies
- Real Estate Appraiser, Ogdensburg - Appraisal Services
- Real Estate Appraisers & Consulting Services, Ogdensburg
- Real Estate Consultants, Ogdensburg
- Real Estate Services, Ogdensburg
- Recreational Good Manufacturers, Ogdensburg
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- Recreational Services, Ogdensburg
- Rehabilitation Centers, Products & Services, Ogdensburg
- Rehabilitation Specialists, Ogdensburg
- Religious Organizations, Ogdensburg
- Rental & Leasing Business Equipment, Ogdensburg
- Repair Services, Ogdensburg
- Research Services, Ogdensburg
- Residential, Ogdensburg
- Residential Apartments, Ogdensburg
- Residential Care Facilities, Ogdensburg
- Resorts & Hotels, Ogdensburg
- Restaurants/Food & Dining, Ogdensburg
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